What is extensor expansion?

Human hand consists of wrists, palms, four fingers and thumb. Each part of the hand is associated with other complex network of twenty -seven different bones of connected muscles, tendons and bindings. Extensor expansion, also referred to as the "dorsal hood", is a strip of tendons that form the back of the hand. When the muscle is "turned on" or closed, the tendons allow the bones to move. However, in expansion of the extensor, they are flat, almost smooth appearance.

The

hand muscles are divided into two groups, inner and external muscle groups, depending on their location, connection and movement. The muscles of the thumb located in the eminence and the pillows, the padded area directly below the thumb and the muscles of the small finger placed in the hypothenar eminence or padded areas below the last finger are considered toThe muscles are. These two sets of muscles begin between metacarpal bones or fingers bones and a collection of muscles known as lumbricals that allow your hands to bend or curl. From there, the inner muscles are attached to the expansion extensor.

In the hand, expansion of the extensor is divided into three separate strips. The side belt stretches from the proximal phalanx or toes in the center of the hand down to the ends of the fingers, while the singular middle section leads to the bottom of the middle finger. The third belt, called a retinacular ligament, follows in parallel along the middle finger and runs to the front or palm sides of the fingers connecting the fibrous wrapping of this tendon to the extensor.

As with any other muscle or tendon in the body, the expansion of the extensor may be damaged due to injury and a certain health condition that causes inflammation or pain and swelling of the area. For example, hands arthritis that causes the abnormal joint structure of the joints may cause these tendons to be irritated or pushed from their normal position. AtSlice can cause tenderness or pain in your hand and cause problems with the movement of the hands.